Which reason would you like?
1) The images are of medical procedures. It is socially inappropriate to publicly display photographs of medical procedures because frankly, they are unsettling. This is the same reason it is not socially acceptable to publicly display photographs of heart bypassses, lung transplants, tonsilectomies, or any other surgery because many people are made uncomfortable or ill by the sight of blood and tissue. Even cable television programs that show medical procedures (real or staged) are prefaced with a warning for viewer discretion.
2) The images are often photoshopped, mislabeled, or both. Some of the most common “pro-life” pictures of aborted fetuses originated when a group of “pro-life” activists trespassed on clinic property and went dumpster diving in medical waste. Because these “activists” were not doctors and had no biological training, they labeled their photographs with whatever gestational age they felt like, and these labels persist today. Another common tactic is taking a picture of an advanced fetus and photoshopping a small size reference, such as a quarter, to make it appear that early embryos are very developed and babylike.
3) The images are often not of abortions. “Pro-life” photographs of very, very late-term fetuses are virtually never the result of elective abortion. These pictures are often taken from case studies of rare and horrific fetal abnormalities published in medical journals. The parents of these children have lost very wanted pregnancies, and only gave their consent for the photographs to be used in medical journals for scientific purposes, hopefully so their child’s condition could be studied and remedied in future families. There are also cases of stillbirth photos being stolen from family blogs and medical websites for appropriation in the “pro-life” movement. Another common misappropriation is a photo of a whole embryo in its gestational sac, which was the result of a hysterectomy due to cancer.
4) The images are used in lieu of an actual discussion about medical rights. "Pro-life" organizations like Abolish Human Abortion and the Genocide Awareness Project claim they use these photographs to "start a discussion," but what they are really attempting to do is disgust the viewer into agreeing with them without even thinking about what abortion is and why people might choose it. When a neutral viewer is overwhelmed with thoughts of "ew, blood," it is difficult to consider the fact that a fetus does not have the right to use a woman’s body without her consent, or that all medical procedures are pretty gross and therefore irrelevant to the issue at hand.
That’s why I’m still pro-choice.